Validate the debug mappings generated by the JIT using the
MethodILToNative event. Unfortunately we can not use EventListener as
the event there does not contain the actual mappings (dotnet#12678) so this
reuses some of the facilities from the tracing tests to use EventPipe
and TraceEvent.

This only adds the infrastructure and a small number of tests, but
at least this should make it easier to add more tests in this area in
the future.

There are some more limitations, for example we cannot validate the
CALL_INSTRUCTION mappings generated for the managed return value feature
because the debugger filters them out of the table reported. I am hoping
we can change these mappings to be included as normal in the future.

Tiering should not affect the minimum mappings we get, only
DebuggableAttribute should. Also make sure we are testing optimized code
instead of quickjitted non-debuggable code.

Since we test with TC on and off in innerloop we can allow it to test
both flavors.